SEDL / STP / STP754-EB / STP37049S

New Intermetallic Compounds in Zircaloy-4

Grange, JM
Metallurgist, senior engineer, and director of production, Cezus, Pechiney Ugine Kuhlmann, Ugine,

Charquet, D
Metallurgist, senior engineer, and director of production, Cezus, Pechiney Ugine Kuhlmann, Ugine,

Moulin, L
Metallurgist, senior engineer, and director of production, Cezus, Pechiney Ugine Kuhlmann, Ugine,

Pages: 9    Published: Jan 1982

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Abstract

The precipitation of intermetallic compounds in Zircaloy-4 has been studied by transmission electron microscopy. The classical precipitates with a ZrCr² lattice have been observed. In addition to these precipitates, a hexagonal phase with lattice parameters a = 7.9 Å and c = 3.3 Å can be developed by quenching from the temperature range 840 to 870°C. This phase is metastable and transforms into a zirconiumiron compound by aging at 600 to 650°C.